1girl absurdres antlers black_thighhighs blue_archive blush breasts christmas christmas_ornaments christmas_tree closed_mouth halo highres long_hair long_sleeves mechanical_halo medium_breasts purple_hair red_shirt reindeer_antlers shirt solo stuffed_animal stuffed_toy taccho teddy_bear thigh-highs two_side_up violet_eyes yuuka_(blue_archive)